Finding the Fourth Proportional to 3,405.53, 5,099.53 and 2,019.85

Step by Step Solution

1. Step 1: Write the proportion equation
   3,405.53 : 5,099.53 = 2,019.85 : x
2. Step 2: Convert to fraction form
   3,405.53/5,099.53 = 2,019.85/x
3. Step 3: Cross multiply
   3,405.53x = 5,099.53 × 2,019.85
4. Step 4: Simplify right side
   3,405.53x = 10,300,285.67
5. Step 5: Solve for x
   x = 10,300,285.67/3,405.53
6. Step 6: Final answer
   x = 3,024.58